Vacon NX series Applications Manual page 323

PARAMETER DESCRIPTIONS
constant is internally increased to 3 times the set parameter value, because the cooling
operates based on convection.
See also Fig. 73 The motor thermal time constant.
708 MOTOR THERMAL PROTECTION: MOTOR DUTY CYCLE 234567 (2.7.12)
The value can be set to 0%-150%. See Chapter 8.4 Parameters of motor thermal protection
(IDs 704 to 708).
For example, if you set the value to 130%, the motor goes to the nominal temperature with
130% of the motor nominal current.
I/I T
T
100%
63%
Fig. 73: The motor thermal time constant
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Current
T = Motor thermal time constant
VACON · 323
t
t
8